When more than one fixture is required on the same date of a draw for either double headers or one day tournaments the date must be added to preferred dates multiple times for the required number of rounds.
An option will be presented in Phase Settings > Preferred Times to “Fill all venues at first preferred time, then use alternate times”
By selecting this option, all fixtures in each round will be scheduled at the same preferred time using the required number of venues. The first round being scheduled at first preferred time, the second round being scheduled at the second preferred time etc. If there are multiple sections within a grade and each section has different preferred round times, then preferred times can be added in the order of use, for example Section 1 has rounds at 10am, 12 pm and 2pm and Section 2 has rounds at 11am, 1pm and 3pm, by adding the preferred times in this order, will provide the desired outcome.
Note: To achieve this, it is important to select only the required number of venues for each section before generating the draw.